Ultra violet ray lamp



April 17, 1934. M. PARIS] 1,954,338

ULTRA VIOLET RAY HIP Filed Aug. 19. 1931 INVENTOR A TTORNE Y Patented Apr. 17, 1934 UNITED ULTRA VIOLET RAY LAMP Application August 19, 1931, Serial No. 558,027

6 Claims.

This invention belongs to the class of appara tus using mercury vapor for generating ultra violet rays, such as used-in therapeutical treatment, or for photography, or other uses. One object of this invention is to produce an apparatus capable of generating a larger amount of such rays, at a comparatively lower cost, than the average apparatus already in use.

Another object of this invention consists in producing an apparatus which for its mechani cal sturdiness would be practical and highly cilicient. With these and other objects in View, I have attached the following drawing, with a description and annexed claims.

Fig. 1 shows in full size my apparatus, and numerals indicate the various parts. This type of apparatus is designated to. work on direct current only, from a lighting socket. It consists of a vacuum bulb (1) made of pure silica or quartz.

Inside of said bulb, attached to a quartz diaphragm (15) is a U shaped member (14) made of either porcelain or lava, on which two resistance winding (2) are wound. This U shaped member may be attached to the quartz diaphragm (15) by means of rivets (12). The re-- sistance windings terminate to two metal caps (3) to which they are welded. These caps also form an integral part with the electrodes of the apparatus. Numerals (l5) indicate the said electrodes, consisting of steel wires of about three thirty-seconds or an inch in cross section (22) The quartz bulb (1) has a tubular hollow prolongation up to 23, and at a point midway of said extension is provided with a mercury seal T which I wish to describe.

Through the quartz diaphragm (15) are drilled two small orifices (1316) of a diameter exactly that of the wires of the windings. The orifices leading inside the two quartz tubings (25--26).

T t These tubings are of a diameter of three sixteenths of an inch, and about one inch long. The wires of the windings are broken at half Way the length of said tubings, at (8). The bottom of these tubings is partially filled with asbestos 7. .3 powder, and tiny mica discs (24). On the top of these mica discs is placed some mercury, for about one quarter of an inch of the tubings length. Two other pieces of wires (7-6) are fit tightly to two quartz discs (27) and placed on L the top of the mercury. The remaining length of the tubings should be filled with hard sealing wax (10). The seal will be completed by a welded quartz diaphragm (28), and the terminal wires will be soldered to an Edison plug (9) l cemented on the bulb. The bottom of the bulb (1) is provided with two protuberances (17-18) filled with mercury (19). In these protuberances are dipped the electrodes (45) of the apparatus. The bottom of the apparatus (21) is curved so that a certain gap (20) will separate the two mercury pulls. The upper portion of the bulb (1) as from AA, is being coated with silver,

in order to provide a mirror-like reflecting surface. The purpose of the resistance winding (2) r is for taking into account the potential fluctuations of the circuit, as it is necessary to have a constant potential for the proper functioning of the apparatus. When said apparatus is connected with a direct current supply, it will be necessary, to start it, to tip same on one side, 0 so that the mercury from one protuberance will make contact with that intothe other, and an arc will be established. This are will remain burning, and giving a constant source of ultra violet rays, as long as the potential of the supplying circuit will remain uniform.

It should be understood that I do not intend to limit myself to the present structure of the apparatus as many changes can be made without departing from the spirit of my invention- Having thus described my invention, what I claim is: r I a 1. man apparatus for generating ultra violet rays, in combination with a bulb having cavities r, containing mercury pools, electrodes having their free ends disposed in said mercury pools, stabilizer coils formed integrally with the respective electrodes, U-shaped support carrying the re spective coil windings on its legs, a plurality of diaphragms, one of said diaphragms having at- 99 tached thereto the base of the coil support, a plurality of hollow casings disposed in the neck of said tube between said diaphragms, mercury seals comprising pools of mercury disposed centrally in said hollow casings, the ends of said casings being sealed, leads from the coils being adapted to pass through the diaphragms carrying the support, and the seals at one end of the respective hollow casings, and project into the mercury pools therein, a plurality of terminals formed on the head of said tube and conductors leading from said terminals and passing through the other sealed ends of said hollow casings into said mercury pools.

2. In an apparatus for generating ultra violet rays, in combination with a bulb having cavities containing mercury pools, electrodes having their free ends disposed in said mercury pools, stabilizer coils formed integrally with the respective electrodes, U-shaped support carrying the hollow casings, and project into the mercury 1.

pools therein, a plurality of terminals formed on the head of said tube and conductorszle'ad'ing';

from said terminals and passing through the, other sealed ends of said hollow casings'into said mercury pools, and means for supporting the conducting wires leading fromathe terminals Oil the tube Within said hollow casings. H

3. An apparatus for generating ultra violet" rays, comprising a bulb, mercury. poolsmcarried in cavities-formed in the bulb, electrodes disposed within the bulb and-having-their free ends dis: posed-Within the mercury pools, stabilizing coils I formed integrally-withthe.other'ends' of said electrodes and wound on a rigid support, adiaphragm at the neck of said tube carrying s'aid rigidsupport, a plurality of mercuryseals disposed inthe-neck of said bulb, said mercury seals comprising-hollow-tubings sealed at their respective ends and disposed between the first-mentioned diaphragm and a secondldiaphragm disposed in the neck of said bulb, a pool of mercury disposed at each of said tubings and theiree ends of the coils being adapted to project .into the pools of mercury in said tubings, terminals on said bulb and conductors. leading from said terminals into thamercury pools insaid-tubings, the ends of the respective conductors leading from the termi-. nals of the, bulb and from the respective coils, bee ing spaced fromoneariother withinthe: mercury pool in the tubings. 4. In an apparatusifor generating ultra violet rays, arbulb, pools of mercury carried in said bulb, electrodes having free ends projecting into saidmercury pools, stabilizer coils integral with the other ends of 'said electrodes, said .stabi lizer coil being carried on a rigid frame, a diaphragm inthe neck of said bulb, to which said rigid frame is attached, thereby to provide substantially rigid support for the electrodes and the stabilizer coils associated therewith within said bulb, terminals on the neck of said bulb, and means comprising mercury seals for interconnecting the terminals with the ends of the stabilizer coils.

5. In an aparatus for generating ultra violet rays, a :bulb, pools of mercury carried in said bulb, electrodes having free ends projecting into said mercury pools, stabilizer coils integral with the other ends of said electrodes, said stabilizer coils being carried on a rigid frame, a diaphragm in :the neck of said bulb, to which said rigid frame is attached, thereby to provide substantially rigidisupport for the electrodes and the stabilizer coils associated therewith within said bulb, terminalstonathe neck ofisaid bulb, mercury seals comprising hollow tubes sealed at their respective ends and having mercury pools centrally disposed therein carried in-the neck of said: bulb, conductorsnleading from said terminals .into the pools otsaidtubes, the-free ends of said stabilizer coils beingiadapted to lead into the mercury pools within saidmercury seal.

6. In an apparatusfor generatingultraviolet rays, a bulb, pools of mercury carried in said bulb, electrodesv having-free ends projecting into said mercury pools, stabilizer coils integral with the other ends of said electrodes, said stabilizer coil beingv carriedon airigid frame, a diaphragm in the neck of :said bulb, to which saidrigid frame is=attached, thereby to provide substantially rigid support for the. electrodes and the stabilizer coils associated therewith withinsaicl bulb, terminalslon the neck of saidbulb, and vmercury sealsmcomprising. hollow tubes sealed at their respective ends'and havingimercury pools centi'allydisposed therein carried in the neck of said bulb conductors leading from said terminals into the pools of said tubes, theireev ends ofsaid stabilizers coils. being adapted to.lead .into the mercury poolsawithinsaid mercury seals,and a secondediaphragm in:.the neck of .said bulb, cooperating with .said first-named .diaphragm to supportlsaid mercury, seals within the neck of said bulb.

. 'MICHAEL PARISI. 

